Last year, starting in the preseason, the Raiders' offensive line had more personnel changes than the Temptations did through the '70s and '80s. This year, at least there's stability.

While the tight end corps has taken some hits, the line has stayed intact. In 2013 there were already three replacements going into the second preseason game, offensive coordinator Greg Olson pointed out Tuesday.

"Besides the fact we've stayed healthy there, they're also a relatively veteran group of guys, so they've seen a lot," Olson said. "That's been a bonus for us as well."

Although quarterback Matt Schaub was under pressure against Detroit's first unit in the Raiders' win Friday, both head coach Dennis Allen and Olson defended the performance of the offensive line.

"I think that group is beginning to jell together as a unit," Allen said. "They're playing with confidence." He said the O-line "is going to be one of the strengths of our football team."

"It wasn't perfect," he said. "Any time there's any pressure on the quarterback, the first thing everybody wants to do is look at the offensive line. ... That's not the case. I thought they played well against Minnesota. I thought they played well against Detroit. There's obviously still some things we've got to get cleaned up."

The Lions had just one sack, none allowed by the first unit. Backup quarterback Derek Carr took a sack in the third quarter. Carr later was knocked out of the game, and his status for Friday's third exhibition game at Green Bay is up in the air.

But there were three pressures on Schaub early. According to Olson, one came from a "game" by crisscrossing linebackers on a third-down play. Another pressure was not the line's fault, instead coming when Schaub failed to make the proper read in time on a blitzing linebacker. A third resulted from a missed cut block, Olson said.

The Packers will provide a quality test for the offensive line. "They've got one of the better defensive lines that we'll see," Olson said.

James Jones, the former San Jose State wide receiver who caught a league-high 14 touchdown passes for the Packers in 2012, will again start opposite Rod Streater, Olson said.

"There's not a lot that we feel like we have to see from James Jones," he said. "For him, it's let's get through these two weeks and make sure he's fresh and ready to go for the opening game against the Jets."

Beyond Streater and Jones, the wide receivers are closely matched. They have two more exhibitions to prove they're ready for the 53-man roster.

Olson said he's looking for more consistency from the group. "We've had a number of drops throughout training camp. It hasn't been one player in particular. As a group, we need to catch the ball better."

Briefly: Fullback Marcel Reece (foot) went through a limited practice. Allen indicated an MRI exam was negative. ... Schaub and the rest of the first unit might play into the third quarter in Green Bay, Olson said.